#34357A
Closest named color: Dark Slate Blue (#483D8B). oklch(36.9% 0.115 278.5), rgb(52, 53, 122).
Aa
White text reads best on this color (10.84:1).
About this color
#34357A is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.115 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.049 away. White text reads best on it, at 10.84:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.93:1 |
| White text | 10.84:1 |
Values
| HEX | #34357A |
| RGB | rgb(52, 53, 122) |
| HSL | hsl(239, 40%, 34%) |
| OKLCH | oklch(36.9% 0.115 278.5) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #34357A | 10.84:1 | AAA | Lc -98.8 | Preferred for body text |
| Black text on #34357A | 1.93:1 | Fails | Lc 9.0 | Not readable |
| #34357A text on white | 10.84:1 | AAA | Lc 94.9 | Preferred for body text |
| #34357A text on black | 1.93:1 | Fails | Lc -7.8 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 900.
-
Step 50
50
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E6E9FB
oklch(93.7% 0.024 278.4)
-
Step 200
200
#D1D7F9
oklch(88.5% 0.047 277.5)
-
Step 300
300
#B4BCF8
oklch(81% 0.085 278.4)
-
Step 400
400
#8E96F5
oklch(70.7% 0.138 278.6)
-
Step 500
500
#7579F1
oklch(63.2% 0.176 278.6)
-
Step 600
600
#5F5EDF
oklch(55.5% 0.191 278.5)
-
Step 700
700
#4F4DC2
oklch(49.2% 0.178 278.4)
-
Step 800
800
#41409D
oklch(42.8% 0.147 278.7)
-
Step 900
900 (this color)
#34357A
oklch(36.9% 0.115 278.5)
-
Step 950
950
#1F2149
oklch(27% 0.073 278.2)
#34357A with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #09407C | 0.047 |
| Deuteranopia (no green cones) | #003A79 | 0.048 |
| Tritanopia (no blue cones) | #114552 | 0.100 |
| Achromatopsia (no color) | #3D3D3D | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #34357A
#34357A
oklch(36.9% 0.115 278.5)
- #4A3F00
#4A3F00
oklch(36.8% 0.076 98)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #34357A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.049
- Twilight Blue #0A437A ΔE 0.052
- Marine Blue #01386A ΔE 0.059
- Cobalt #1E488F ΔE 0.060
- Blueberry #464196 ΔE 0.063
- Prussian Blue #1D3557 ΔE 0.070
- Marine #042E60 ΔE 0.076
- Light Navy #155084 ΔE 0.077
Use #34357A in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.